Technical information

Troubleshooting and Repair
137
Troubleshooting
Powering Down the Peripheral Nodes
1. Remove the front panels.
2. If your system is redundant, set ACTIVITY FREEZE (at
the control node) to ON.
3. Switch off the power converter.
4. Set the power switch on the rear of the node to “0” (OFF).
5. Unplug the external power cord at the rear of the node.
Powering Down the DSU Nodes
1. If your system is redundant, set ACTIVITY FREEZE (at
the control node) to ON.
2. Set the power switch on the rear of the node to “0” (OFF).
3. Unplug the external power cord at the rear of the node.